Simulated effects of alternative withdrawal strategies on ground-water-flow patterns, New Jersey Pinelands

Modica, Edward

doi:10.3133/wri954133

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…Studies of groundwater flow in areas that include JBMDL, Pine Lake, or Little Pine Lake generally assume a gaining condition, without integrating the hydrolithologic heterogeneity of the Kirkwood-Cohansey aquifer system (Modica, 1996;Nicholson and Watt, 1997;AECOM, 2010;Cauller and others, 2016) or vertical hydraulic gradients (Watt and others, 1994;Watt and others, 2002;AECOM, 2010) as part of the assessment. Therefore, prior knowledge of groundwater conditions and groundwater/surface water interaction associated with these specific lakes is limited.…”

Section: Surface Watermentioning

confidence: 99%

Hydrogeology and gain/loss assessment of two lakes contaminated with per- and polyfluoroalkyl substances, vicinity of Joint Base McGuire-Dix-Lakehurst, New Jersey, 2020–21

Fiore¹,

Witzigman²,

Reiser³

2021

Scientific Investigations Report

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Per-and polyfluoroalkyl substances (PFAS) have been identified in two lakes near Joint Base McGuire-Dix-Lakehurst (JBMDL) in New Jersey-Little Pine Lake in Pemberton Township and Pine Lake in Manchester Township. The streams that enter these lakes begin in or near JBMDL where sources of PFAS contamination are located. The U.S. Geological Survey, in cooperation with the U.S. Air Force Civil Engineer Center, performed a study of the hydrogeology and the gaining or losing conditions associated with these lakes.Hydrogeologic characteristics in the vicinity of both lakes were assessed using qualitative vertical hydraulic profiling of the subsurface. Groundwater was pumped from test intervals at various depths below land surface, then groundwater levels were measured until they recovered to static conditions. Low permeability aquifer intervals were identified within the aquifer underlying both lakes, consistent with silty and (or) clayey subunits of the Kirkwood-Cohansey aquifer system indicated on geophysical and lithologic logs.Gaining or losing conditions between groundwater and lake surface water were assessed with continuous monitoring of water levels and temperature in the lakes and in three piezometers per lake screened at different depths in the underlying aquifer from August 2020 through May 2021. At Little Pine Lake, surface water levels were consistently lower than groundwater levels, which is indicative of a gaining condition with groundwater flowing into the lake. Gaining conditions also support the lack of diurnal temperature fluctuations observed in groundwater, but poor response of surface-water temperature prevents complete analysis. The potential for losing conditions at other locations around Little Pine Lake necessitates further assessment in regard to possible PFAS contamination of groundwater in the underlying aquifer. Temperature results were inconclusive at Pine Lake, but surface water levels were consistently higher than groundwater levels throughout the monitoring period, which indicates a losing condition with lake water flowing into the underlying aquifer. Because of the downward vertical hydraulic gradient identified at Pine Lake, there is a strong possibility that PFAS in the lake water has also contaminated groundwater in its vicinity. GroundwaterFiore (2020) described the regional hydrogeologic structure in the vicinity of JBMDL, which included areas where Little Pine Lake and Pine Lake are located. Both lakes overlie the Kirkwood-Cohansey aquifer system, which consists primarily of sands from the Kirkwood Formation, Cohansey

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Section: Surface Watermentioning

confidence: 99%

Hydrogeology and gain/loss assessment of two lakes contaminated with per- and polyfluoroalkyl substances, vicinity of Joint Base McGuire-Dix-Lakehurst, New Jersey, 2020–21

Fiore¹,

Witzigman²,

Reiser³

2021

Scientific Investigations Report

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Estimating areas contributing recharge to wells, lessons from previous studies

Franke¹,

Reilly²,

Pollock³

et al. 1998

Circular

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Documentation of revisions to the regional aquifer system analysis model of the New Jersey coastal plain

Voronin¹

2004

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The model, which simulates flow in the New Jersey Coastal Plain sediments, developed for the U. S. Geological Survey Regional Aquifer System Analysis (RASA) program was revised. The RASA model was revised with (1) a rediscretization of the model parameters with a finer cell size, (2) a spatially variable recharge rate that is based on rates determined by recent studies and, (3) groundwater withdrawal data from 1981 to 1998. The RASA model framework, which subdivided the Coastal Plain sediments into 10 aquifers and 9 confining units, was preserved in the revised model. A transient model that simulates flow conditions from January 1, 1968, to December 31, 1998, was constructed using 21 stress periods. The model was calibrated by attempting to match the simulated results with (1) estimated base flow for five river basins, (2) measured water levels in long-term hydrographs for 28 selected observation wells, and (3) potentiometric surfaces in

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Simulated effects of alternative withdrawal strategies on ground-water-flow patterns, New Jersey Pinelands

Cited by 3 publications

References 6 publications

Hydrogeology and gain/loss assessment of two lakes contaminated with per- and polyfluoroalkyl substances, vicinity of Joint Base McGuire-Dix-Lakehurst, New Jersey, 2020–21

Hydrogeology and gain/loss assessment of two lakes contaminated with per- and polyfluoroalkyl substances, vicinity of Joint Base McGuire-Dix-Lakehurst, New Jersey, 2020–21

Estimating areas contributing recharge to wells, lessons from previous studies

Documentation of revisions to the regional aquifer system analysis model of the New Jersey coastal plain

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